Dichotomous Key with smiles
1. Teeth visible ....................go to 2
.....Teeth not visible .................go to 4
2. Has a wide, toothy smile .......Smilus toothyus
....Is not smiling ......................go to 3
3. Visibly crying .................Smilus dramaticus
.... Frowning .......................Smilus upsettus
4. Eyes are symmetrical .... go to 5
....Eyes not symmetrical .....go to 8
5. Eyes shaped like hearts ..... Smilus valentinus
....Eyes are shaped as ovals .....go to 6
6. Smiling, happy face ...... Smilus traditionalis
.....Not happy, frowning or other .....go to 77. Mouth curved down, frowning .... Smilus saddus
.... Mouth is a small circle .................Smilus suprisus8. Has a pirate eye patch ...............Smilus piratus
....Does not have eye patch ............ go to 99. One eye is much larger than the other eye ..... Smilus mutatus
One eye is winking .................Smilus winkus